Rotary bolt lock



l F. J. DowLlNG ROTARY BOLT LOCK Nov. 2,5, 1930.

original Filed June 17, 1925 2 Sheets-sheet zul.

Nov. 25, 1930. F. J. BOWLING 1,782,776

ROTARY BOLT LOCK rginal Filecr- June 17. 1925 2 Sheets-Sheet 2 YlNvENToR Patented Nov. 25, 1930A UNITED STATES Y FRANo1s"L"r`.."nOwLING, OF NRW YORK, N. ir., AssIGNOR To FRANCIS Kinn & SON, rNol.,Y Y or NEW YORK, N. Y., A CORPORATION or NRW YORK Y "'ihis inventionrelates tolock Yconstruction and, with regard to its more specificfeatures,

to jimmy-proof locks such as those employing a rotatable boltmember. u jOne of the ob'ects of the invention is to u provide a lock which isthoroughly practical and highly. efficient, affording Ygreat security.Another object is to provide a construction of the above nature having abolt' which, when it is in locking position,is`depend`ably j held insuchposition against any attempt to ofi a tool `or otherwise. j to provide alock of the above nature which 1s force theibolttoretracted positionbymeans simple. inV construction and inexpensive to build. M i Y' Anotherobject of the invention is to provide a lock having apluralityofrotatable bolts which" cooperate with each other and withl an actuatingmeans to provide a strong and reliable jimmy-prooflock- Another objectisto provide abolt having guarding and reinforcing means which dependablyprotect the boltfroni being cut through by asaw o r the like. Otherobjects will be in part `obvious K or in part pointed out .hereinaften iside of Figure. 1;

The invention accordingly consistsin the features of' construction,combinations of elements and arrangements ofparts as `will beexemplified in the structure to be hereinafter described, the scope ofthe.`application of claims.

In the accompanyingdrawings in*` which are shown one orflnoreoi',` thevarious possiT i i whichwill be findicatedfinthe'gfollowing blfefembOdimentsof-the several features of `this'invention,j` Y Y Figurelisafview from the rear side of thelockfoasing showing the rear coverplate removedfto expose the mechanism, and showingthe bolts inretractedlposition; j

,Figure` 2V is `a viewjfro'm4 the rightshand j "Figure Sis a viewsimilar-to Figure lfbut showing thebolts inV projected and lockingposition; ju j f l,Figure 4 is a view `fronti the rightshand sideofFigure 3; Y y Y Y `l3`i`guref5i is a section taken along the line 55OfFigure3; l Yi Y` Another object "is Y Y Figure`14 isa PATENT OFFICE 4Y Y ROTARY BOLT LOOK .i Application med rune 1.7, 1925, serial No.37,658. .Renewed November 15,192'7'..` j

Figure 6 isV asection taken along the line 6 6 of Figurel; f j i f i D Y.F'gure` 7 isaperspect'iveviei'v of a bolt and the parts carriedthereby, partially brokenaway;` Y l Figure is a view similar to Figure 1showing a modified Vconstruction Vand showl ing the bolts at anintermediate position Figure 9 is a sectionl taken as indicated by theline .9-.-9 "in 'Figure 8; Y

Figure 10 is a view similar to`Y-Figure8 j but showing part` of theactuating mechamsm removed; j

Figure lllis a section taken `as'indicatedby the line 11-11 in FigurelO;j j. Y

j Figure 12 is'a section taken as indicated by the`line`1212inFigureylO, i f j Figure`13' is an elevationof the strike or keeper;V ij j w. u i

sectional view of the strike,

Figure 15 shows the keeper viewed' froin the left-hand side {Of Figure13;

`Similar reference characters referto sini-` the drawings.

vlar parts throughouttlie severalvi'ews of Referring now" to thedrawings in detail,

andlirst to Figure l, there is showna1 lock casing 1() having in theright-hand end Wall thereof (as-viewed in Figure 1) an opening "lthrough which a pair of bolts 11 are arranged to slide and take `int`o'akeeper when slid outwardly or projected. As shownfin Figure y 2, each ofthesebolts 1l is provided at itsouter end with a transversely projecting`arm `or i tongue 12 whichis adapted to `turn into jimmyproof positionwithin Y a @wall ofthe keeperwhen the bolts are projectedv and `ro-`tated," as" will be described hereinafter. As shown in Figure 2, theendwall of the casing 10 is` preferably provided with a single open-L ingforthe reception of thebolts,` this open# i ing consistinrof `twocircularly shaped por-` tions 16in which thefboltsfslide and4 aYcon`-`nectingstraight portion 17 forreceiving theV tongues 12. When the bolts`are inmetr'acted position, asshown "in Figuresjlf and 2, the

tongues 12 projecttowardeach other and substantiallylill the Vopeningportion 17.`

lVhen the bolts areA projected into final locking position, thesetongues 12 are moved through substantially O and into positions at rightangles to their positions when the bolts are retracted, all as will bedescribed more fully hereinafter.

As shown in. Figure 7, each ofthe bolts 11 is preferably provided with acylindrical outer sleeve 13 of hardened steel. The body portion ofthebolts may be made of some relatively soft but suitably tough,V andstrong material. The sleeves 13 have a loose fit upon the bolts 11 sothat they ai'e freely rotatable thereon. These sleeves thus serve as areinforcement for the bolts, entering the keeper therwith, and theyserve as a dependable guard Vagainst any attempt to saw thebolts in two,as by means of a saw inserted between the lock casing and the keeper. lfit is attempted to saw the bolts in two, the saw merely causes thesleeve 13 torotate without havingany cut-ting action thereon, andth'ebolts are thus safeguarded.

Atfthe outer ends of the bolts the sleeves 13 are held in placeby thetongues 12 and the flanges which are preferably provided as shown inFigure 7. r"he outer surfaces of the sleeves preferably comesubstantially flush with the edges of these end flanges of the bolts, asmay be seen in Figure At the inner ends of the bolts (Figure 1) areprovided members 14, in the shapeof collars or iings, which are secureduponthe bolts as by means of pins 15 (Figures 5 and 7). These members14.y hold the sleeves 13 in place at the rear ends of the bolts. Thesleeves 13 are thus Vdependably held in position on the bolts, beingloosely mounted-thereon for rotation relative thereto and held againstendwise movement relative to the bolts by means of the flanges at theforward endsthereof and the members V14 at the rear ends.

Referring again to Figure?, rearwardly of the members 14 the bolts areprovided with reduced portions 22 and, rearwardly of the portions 22 areenlarged portions or heads 21. The portions 21 are of a ldiameter equalto or less thanthat of the body ofthe bolts 1l so that the members 14may be slipped thereover `and into position upon the rear ends of thebolts.

Referring again to Figure 1, within the casing 10 is a slidable platemember 2O which is supported and guided in its sliding movements bysuitable tracks or flanges 32 (Figure 3)` formed on the inside of thecasing. The edge of the plate 2O adjacent to the bolts 11 is providedwith a projecting flange 24 (Figure 6) and, adjacent to this flange area pair of openings-26 (Figure 1) for receiving the heads 21 of the innerends of the bolts. Secured to the surface of the plate member 20,opposite to the flange 24, is an' angle member provided with a flange 2Qresting against the plate 20and an upstanding flange 28. This anglemember is fastened in place by suitable rivets or screws 30, as shown inFigure 1, and has a pair of openings 31 registering with the openings 26in the plate 20. As shown in Figure 6, circular openings 27 are formedin the end wall built up of the combined flanges 24 and 28, and in thesecircular openings rest the reduced portions of the bolts, the heads 21resting in the registering openings 26 and 31. Thus, the bolts 11 are7:3 connected to the plate 2O to partake of the sliding movements of theplate and to rotate relatively thereto about their respectivelongitudinal axes. Referring to Figure 5, each of the members 14 of thebolts 11 has a pair of projecting lingers or horns 18 and 19. As shownin Figures land 6, Xed within the easing are a pair of spirally shapedcams 33 against which the projecting horns 18 bear. As shown in Figure6, there is provided a spring 35 anchored upon pins 36 secured in theflange24 and engaging with the bolts 11. Preferably the ends of thespring 35 enter openings 37 (Figure 7) in the heads 21 of the bolts.viewed in ""-l Figure4 6, the spring 35 tends to swing' the left-handbolt 11 in a counter-clockwise direction and tends to swing theright-hand bolt 11 in a clockwise direction, thereby holding the horns18 against the cam surfaces As shown in Figure 1, the cams 33 haveportions which are substantially straight so that. as the projection ofthe bolts is started, they are held against rotation for a given lengthof movement and until they enter the keeper; thereafter, the spiralportions of the cams come into operation and rotate the bolts relativeto the plate 2O through substantially 90", turning the bolts into theposition shown in Figures 3 and 4.

Thus, by moving the sliding plate 20, the bolts 11 are moved from theretracted position shown in Figure 1 to the extended or operativeposition shown in Figure 3. During this movement the sleeves 13 moveloiigitu dinally with the bolts, but preferably do not rotatethcrewith,the sleeves being preferably held against rotation by frictional Contactwith the casing and the bolt members 11 rotating` within the sleeves.Vhen the bolts reach final'locking position, the members 14 thereon comeinto engagement with the inner surface of the striking wall of thecasing and limit the outward movement of the bolts. As shown in Figure5, projecting inwardly from the striking` wall of the casing is a flange47 spaced from the cam surfaces 33. lVhen the bolts reacli'final lockingposition, the horns 18 are positioned between the flange 47 and the camsurfaces and the bolts are thereby depeiidably locked against reverserotation until they have been moved inwardly. Thus, the boltscannotberotated to bring the tongues 12 into position for withdrawalthrough the keeper opening without irststartinvg the bolts intheirretractive movement. 1 j

Considering now more particularly the actuating meansV for the bolts,swivelled in a wall ofthe casing is a crank arm 38 (Figure 3) which ispreferably operated'by means of a handle on'vthe outer side of thecasing wall.

This crank arm 38 is provided at its outer endl with .a crank pin 45which projects through a about the pin 40 `and bears againstfa pin 43projecting from the plate member and against a pm 42 projecting from theend of the bell crank 39. The spring 41 tends `to swingthe lever 39 inaclockwise direction,

as viewed in Figures 1 and 3. i j

When the bolts are movedffrom the retracted position shown in Figure 1to the final locking `position shown in Figure 3, or given their reversemovement of retraction, the

l crank arm `38 swings through substantially 180, as is indicated in thedrawings. Referring to Figure 1, it will be seen that, when the boltsare inretracted position, thepin 45, the center of rotationofthecrankarm 38 and the pivot 4() are substantially in line withrespect to the direction of movement of the bolts 11. Also, `as shown inFigure 3, `when thebolts are `in final lockingjposition,

these three pivots are again substantiallyin line." The crankarm38 andthe lever 39 thus constitute a toggle mechanism for actuating therotatable bolts, and coact with the latter in a highly advantageous way.For example, as the'mechanism is caused to be moved from the positionshown in Figure 1 to that of Figure 3, any resistancefto rotation of thebolts is effectively overcome by the action of j the spring `41 which,acting on the toggle, in-

sures straightening out of the toggle andthus makes certain of thecomplete extension and rotation of thebolts. This action thus makes itunnecessary'to rely wholly upon the oper-j` ation of the cranks 38 and38a; The relatively small effectiveness of the spring 41 is greatly`multiplied bythe toggle and complete move` ments of'rotationof the boltsare dependably assured, into the positions sho-wn in `Figures 1 and V3.The upper endof the slot 44, as viewed-inthe drawing, limitsthe swingingmovement of the parts. "Referring to Figure 3, it will beseen that thepiyot pin 45 has moved to a position'in whichitis on o-r beyond fa lineldrawn between the axis ofthe crank arm 38 and the pivot '40,` The boltsare thus j dependablv lockedin their rotated'andfex` tended positionsbythis toggle against any attemptto` force them. The toggle cannotbebrokenbyany external forcegapplied tothe. bolts but only Vby turning`the crank arm y38V and thelever 39.

plate inthe usual manner, inwhich is pivoted a `crank arm operated by akey 'and having a crankpm taking `within theV arcuate flange 46`(Figures 1 and .3), the flange 46 being formed upon the lever or togglearm 39and concentric with the crank pin 45 of the crank j' arm 38.

In the embodiment Y shown in Figures 1-7 and above described, when thebolts are projected into lockingfposition they rotate 1 in`thedirections indicated :by' the arrows a in Figure 6, and the `hornsV44or followers 18 are held against the cam surfaces 33 by means of thespring 35. lIn the embodiment shown in Figures 8-11 the operation of thebolts is substantially as hereinbefore described exg ceptthat the boltsrotate in the opposite directions and a `modified cam construction isprovided for cooperating withthe followers 18. Referring to Figures 9,.10, 11 and 12, thecam followers, which are in theseffigures numbered18a, cooperate with spiral cams in the form of Va pair of grooves 33aformed in theeasing 10. These cam grooves 33au positively rotate theboltsiin both theirl movement of projection and movement of retraction,andthe springmeans for holding` the followers in engagement with thecams is done away with; `The bolts, as vthey move from retracted towardoperative position, ro" tate in the directions indicated by the arrows binFigure 9, and move through the keeper opening 49 into the positionshown in Figure 13' As is seen in Figures ,10 and 11, the Cams 33a havesubstantially straight por tions which hold the bolt membersagainstrotation during a `first portion of their pro jecting movement `anduntil the bolts have been advanced a` siiiiicientl distance toenter thekeeper j 48, thereby permit-ting the tongues 12L to rotate into position.in back of the wall 50 of the keeper. f e L j As shown in Figures 13,14 and 15, the strike or keeper48 is preferably provided with an opening52 therein in addition to the opening 49" throughwvhich the boltsfpass.`This opening 52 is placed in a, wall of the keeper whichfis visible whenthe `dooris l closed, and through this opening'the opera! tion ofthebol'tsmay be observedv as they enter the keeper and rotate intofinallocle i ing position.` i

boltsand' dependablyguard against? any attempt to saw them intwo'. Whenthe bolts f are in nal locking position the Hang-e 47 y L.

the casing depcndably locks them against rotative movement. The toggleformed by the arms 38 and 39 securely holds the bolts against anyattempt to force them longitudinally out of the keeper. The lock issimple in construct-ion and compact and is capable of beingnn'inufactured at low cost.

As many possible embodiments may be made of the above invention and asmany changes might be made in the embodiment above set forth, it is tobe understood that all matter hereinbeforo set forth or shown in theaccompanying drawing is to be interpreted as illustrative and not in alimiting senso.

I claim l. In a lock, the combination with a rotatable bolt hav-ing` afollower, of means for causing the operation of the bolt comprising acarrier movable with the bolt cndwif-,le along the lock, said bolt beingrotatable with respect to thel carrier, and a am which Vcooperates withsaid follower to cause rotation of the follower as a result of the endwmovement thereof and the carrier, the cam being dissociated from thebolt.

2. In a lock, the combination with a rotatable bolt, of means forcausing said bolt to operate comprising a cam, bolt projectingr means,said bolt having `a follower to engage said cam, and resilient means toretain said follower in engagement with said cani to insure properrotation of the bolt.

In a. lock, the combination with a rotatable bolt, of means for ctnatingthe bolt comprising means to pro-ject and retract the bolt, a cam torotate the bolt, means to render the cam effective to rotate said boltduring projection or retraction thereof, said cam being arranged to havecontact with the lastmentioned means along one surface, and resilientmeans operative to retain said means in engagement with .said surface.

4t. In a lock, in combination with a casing and a rotatable bolt, ofmeans for actua ing the bolt comprising a carrier to which the boltswiveled to project and retrrut the bolt, a cam fixed to the casing torotate the bolt as a result of its projection and retraction, meansincluding),l a follower fixed to the bolt to render said am effective torotate said bolt, said cam and said follower having contact with eachother along the cam surface. and means to retain the cam and follower inengagement with each other.

5. In a` lock, the combination with a rotatable bolt, of means foractuating the bolt comprising means to project and retract the bolt, acam to rotateV the bolt, a follower on said bolt, said cam havingengagement solely with said follower to rotate the bolt, said followerhaving contact with said cam along a surface of the cam, and resilientmeans to retainV said follower in engagement with the cam at saidsurface.

6. In a lock, the combination with a rotatable bolt, of means forVactuating the bolt comprising means to project and retract the bolt, acam to rotate the bolt, a follower on said bolt having a finger toengage said cam, said cam having a single surface along which saidfinger has contact, and resilient means operative to retain saidfollower in engagement with the cam along said surface.

7. In a lock, the combination with a bolt, actuating means for causingthe same to enter and engage a strike, and means independent of theactuating` means to cause rotation of the bolt whilef engagingthestrike, of'a sleeve journaled upon said bolt and extending therealong soas to reinforce the bolt and to guard the same from being cut by a saw,the saw being effective merely to cause said sleeve to rotate withoutdamaging the same, said bolt being rotatable independently of the sleeveby means at the rear of the bolt and having means to engage the strikein a jimmy-proof manner when rotated.

8. In a lock, the combination with a bolt, means for projecting androtating the bolt including a cam external of the bolt and dissociatedtherefrom, and a follower on the bolt having engagement with said cam tocause the bolt to rotate when the same is being projected, said camhaving a surface along which said follower is arranged to move,resilient means to retain said follower in contact with said surface,and stop means within the lock arranged to contact the follower at anopposite side thereof relatively to the cam when the bolt is projectedto prevent unintended rotation of the bolt.

9. In a lock, the combination with a lock casing, a rotatable bolt andmeans to move the same endwise along the lock. said means comprising anon-rotatable carrier movable endwise with the bolt, of cam meansexternal of the bolt and secured rigidly at a side of the lock casing,said bolt having follower means at an end thereof engaging said cammeans to cause rotation of the bolt while being moved endwise.

10. In a lock, the combination with a casing, a rotatable bolt, andmeans to move the same enclwise along the lock, said means comprising acarrier movable endwise with the bolt andrat the same speed, of a cam,and means secured to said bolt atan end thereof comprising a memberhaving a follower to contact said cam to cause said bolt to rotate whenprojected by the means aforesaid, and a flange on the/bolt arranged toabut against the striking wall ofthe lock casing to limit the projectionof said bolt.

l1. In a lock, the combination with a `casing, actuating means therein,and a strike, of a bolt comprising a plurality ofmembers which aremovable longitudinallyasa unit, one of said members being rotatablewithin i-,veavve the other and havingprojecting means forinter-engagement with the strike, Athe outer e member` being projectedby the vinner mem- ,.12., Ina lock, thecombination'with acasing,actuating means therein, and afstrike, of a plurality `ofloolts each ofwhich is `rotatable into engagement within the strike when projectedbysaid actuatingmeans, said boltshaving tongues extending toward eachother in retractedposition ofthe bolts, said tongues being effective forengagement with `the strike'asfaforesaid.

13. In a lock, the combination witha casing, and astrike, ofv a boltcomprising projecting means at the rear portion thereof, a cam fixed,within the lockV in engagement with which said.` projecting means ismov,a able for rotation of the bolt, and ari-,actiiatn ing member formoving the bolt longitudif nally to` cause rotation thereof by said cam,

the bolt having projecting vmeans at its outer end for engagementy withthe strike as aref` sult of said rotation.' j, i f i 14. In a lock, the.combination with` a, casing, actuatingmeans therein', and-a strike,

rotatable into .engagement `with thefstrike when projected by saidactuatingmeans, said `bolts having tonguesfto engagefthe strikeextending toward "each otlfierfin4 retracted position l of the bolts, Ysaid` tongues being positioned to one A siede of ai4 plane passingthrough the axes; of the bolts,` said bolts being rotatable inthedirection' of the side of the plane aforesaid when the Vsame areibeingprojected.` j ,j

15. `In a l ick, the combination with acasi ing and a strike, of `abolt, andactuating means therefor, said bolt comp-rising a core, a

sleeve thereon, saidjcorehaving a flange at the forward `end` ofvthebolt to retain the said core at. the rear end of the sleeve to refsleeve on the bolt, said core having a flange at the rear end thereof.to engagesaid actuat-` ing means, said flange being ,positioned sub-`stantially within the elements bounding `the surface ofthecor'etovpermit said 'sleevefto" pass thereover to seat on the core, anda ring arranged to pass over said flangeand seat on tain the sleeve onthe core.` e j i e 16. In a lock, the combination with a casiiigand astrike, Vcfa bolt, and actuating iiieaiistherefor, said bolt comprisingacore,a sleeve thereon, said corehaving `flange at the forwardend of the`bolt to retain `the sleeve on the bolt, said core having a flange atthe rear end thereof to engage said actuatingV means, said flange beingpositioned substantially within the elements bounding the surface of thecore to permit said sleeve to pass thereover to seat on the core, and aring ari'angedtopassover said flange and seat on said core at the rearend of the sleeve to retainthe sleeve on the core, said ring beingarranged to abut `against thefront wall of Said casing to limit theoutward movementof said bolt. i

17. In a lock, the combination with a vcasing and a strike, ofa bolt,and vactuating means therefor, said bolt having means at the inner endthereof to engage said actuating means, and a ring arranged to seat onthe bolt in spaced relation tothe engagingmeans on the bolt, saidactuating means having a bearingmember to be received in the spaceaforesaid, said iingactiiig alsoas an abut- `ment'to 4contact-thefront`wall of the casing `to limit the outward `movement ofthe 'bolt beingsubjectedto any `force inthat direction. `i

g 1,8.. In a lock, the combination witha casing, and a strikelof'a boltcomprising follower means at the rear Vportion thereof, a camlixedrelatively to the casing and in engagement withiwhich said follower ismovable for refn tating the bolt, and anactuating carrier'to move thebolt endwiseto Lcause rotation there-` of as` aforesaid, said carrierand bolt bein in the same position lwith `relation to each ot er` atVall times. i

j v19. In a loek,;the combinationhof acasing", a strike, arotatablebolt-projectable fromlthe l casing "ingto interlocking l`vengagementwith:V

the strike, and actuating ,means for fthe'boltf thus preventing said`actuating means from for rotating it` includinga.stationary spiral 1 jcam fixed in the casing externally of the bolt, and afollower secured tothe lbolt and having wiping contact with thecam,said cam havingdifferent degrees of spirality at `different points between its ends.`

20. In a lock, the combination; of `a casing,

ico

aV strike, a rotatable bolt proj ectable from the` casingl intoengagement with the strike, and actuating means for the bolt including astationary cam fixed relatively to the bolt, a follower` secured to thebolt and cooperating `withthe cam,"and a resilient` member to make`effective the cooperation between the cam and the follower. i i

21. In a lock, the combination ofa casing, a strike,`a rotatable `boltprojectable from the casing into engagement `with the strike, `andactuating meansfor the bolt comprisin a cam'ifixedreljatively to thebolt and'jwit a portion thereof disposed in the `forni subaxis of.`rotation andgfor rotating` said bolt into lfinal locking wposition,saidjmeans` includingcam means fto effect rotation of` said bolt and afetoggle mechanism; adapted tol project said bolt and to move into aposition to oppose initial unlocking movement of said bolt when saidbolt is moved intor final locking position.

23. In lock constructioma casing, in combination, a rotatable boltmovable relative to said casing and into and out ot' locking position; asliding member slidably guided by said casing and connected to said boltto move therewith; means for moving said bolt including a lever pivotedupon said sliding member. a swinging arm pivotally connected to saidlever, and means'for swinging said arm; and nie-ans for rotating saidbolt.

24. In lock construction, in combination, a casing; a rotatable boltmovable in a direction substantiallylengthwise ot its axis of rotationinto and out-oll sai-d casing; and means iior moving and rotating saidbolt includinga cralnkarm siviveledina vvall-l off-the casing and alever connected to` saidJ crank armand cooperating therewith to form-atoggle adapted to oppose initial movement ot the bolt' out of: lockingposition.

25. In lock construction, in combina-tion, a rotatable bolt; means formoving said boltl in a direction substantially lengthwise oi" its a-Xisof rotation into and out of locking position comprising a pair ofswinging lever arms one of Whichhasa pivot movable inposition as thevbolt moves, saidtWo levers cooperating to :torni a toggle and saidmovable' pivot having suchv a range of movement that said toggle maystraighten out; .and means responsive to the'actnation ot said means forrotation said bolt, the eitect of said toggle increasing as rotation otsaid bolt proceeds.

26. In lock construction, in combination, a rotatablebolt; means formoving said bolt into and out of locking position and in adirectionsubstantially lengthwise of its axis otrotat-ion comprising apair of swinging lever arms one otwhich has a pivot movable in positiona-s the bolt moves, said two levers cooperating to form a toggle andsaid movable pivot having-'such a range of movement thatl saidtoggle maystraighten ont; means responsive to thefactuation et said means forrotating said bolt, the efl'ect' of said toggle increasing as rotationof 'said bolt proceeds, and spring means acting against said lever armsin a direction to oppose breaking oi said toggle.

27. In lock construction, in combination, a rotatable bolt; cam meansfor rotating said bolt as the latter moves in a direction substantiallylengthwise of its axis` of rotation; and means for moving said bolt intoand out ot' locking `position and for making said cam means eli'ectivecomprising a pair of' savinging lever arms'one oflvvhich has a pivotmovable in position as the b'olt movesgsaid tivo levers cooperating tolform a toggle adapted to increase' in its eiiect -up'oir said-means fasmovement of :said bolt proceeds and 'said movable pivot having such arange ot movement that the effective arms of said levers may move intoalinement.

28. In lock construction, in combination, a casing 5 a rotatable boltmovable intoandout oflocking position through a Wall ot said casing; asliding plate sl'idably guided by and Within said casing and to- Whichsaid bolt is connected; means for moving said sliding plate and saidbolt therewith including a lever arm pivoted in a Wall of said casing, alever arm pivoted upon said plate, and a pin connecting the ends ofsaidlever arms and projecting through a slot in said plate, an endv ofsaid slot limiting' the swinging of said arm; andI means responsive tothe actuation of one of said lever arms for effecting rotation of thebolt.

29. In lock construction, in combination, a

casing; a rotatable bolt movable into `and out of locking positionthrough a lWall vof said casing; asliding plate Within said `casing andto which said bolt is'con-nected; means tor moving said sliding plateandl said bolt therewith including a lever arm pivotedin a Aivall otsaid casing, a lever arm pivoted upon said plate'and connected'With saidirst-n'i'entioned lever arm to form therewith a toggle; means responsiveto actuation of said toggle for effectingrotation lof 'said bolt; `anda' spring acting upon said toggle' and mounte'dto be movable With'saidsliding plate.

30. In lock construction, inI combinatioi-i, a casing, a bolt having atits outer end means projectingv therefrom `adapted to enter andinterengage with astrike,v means tor moving said bolt out of said casing'and for rotating said bolt, said bolt having adjacent its inner endmeans responsive to said actuating means for coaction in effectingrotation of saidf bolt, and a rotatable sleeve journaled upon said boltintermediate ot' said projecting means and said responsive means.

31. In a lock, the combination With a casing, actuating means therein,and a strike, of a bolt comprisinga plurality ot members Which aremovablelongitudinally ras a unit, one oi said members being rotatable,in response to said actuating means, and having projecting means forinterengageme-nt with the strike, and the other of said menlbers'bci'ngrotatably ournaled upon sai d rotatable member and being projected` withthe latter in response to said actuating means.

In testimony whereof I atlix mv' signature.

FRANCIS J.. newlines.

lill

